Kinetically Controlled Self-Assembly of Ag Nanoclusters with Enhanced Luminescence
Fengjuan Chang,
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Mengting Zhang,
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Wanying Chen
No information about this author
et al.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(30), P. 39847 - 39856
Published: July 18, 2024
Constructing
self-assembly
with
definite
assembly
structure-property
correlation
is
of
great
significance
for
expanding
the
property
richness
and
functional
diversity
metal
nanoclusters
(NCs).
Herein,
a
well-designed
liquid
reaction
strategy
was
developed
through
which
highly
ordered
nanofiber
superstructure
enhanced
green
photoluminescence
(PL)
obtained
via
individual
silver
(Ag
NCs).
By
visual
monitoring
kinetic
process
using
time-dependent
in
situ
spectroscopy
measurements,
assembling
structure
growth
structure-determined
luminescence
mechanisms
were
revealed.
The
as-prepared
nanofibers
featured
series
advantages
involving
high
emission
efficiency,
large
Stokes
shift,
homogeneous
chromophore,
excellent
photostability,
temperature,
pH
sensibility.
virtue
these
merits,
they
successfully
employed
various
fields
luminescent
inks,
encryption
anticounterfeiting
platforms,
optoelectronic
light-emitting
diode
(LED)
devices.
Language: Английский
Ligand‐Mediated Highly Ordered Aggregation of 5‐Mercapto‐2‐Nitrobenzoic Acid Protected Atomically Precise Silver Nanocluster
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 7, 2025
Understanding
self-assembly
of
atomically
precise
nanoclusters
is
paramount
interest
in
designing
various
aggregated
super-structures.
Here
pH-mediated
reported
Ag44(MNBA)30
(MNBA
=
5-mercapto-2-nitrobenzoic
acid)
aqueous
solution.
These
formed
hexagonal
close-packed
(hcp)
structures
when
the
pH
solution
reduced
from
basic
to
neutral.
High-resolution
transmission
microscopy
result
confirms
bilayer
and
multilayer
assembly
at
neutral
pH.
X-ray
photoelectron
spectroscopy
(XPS),
Fourier
transform
infrared
(FTIR)
analysis,
molecular
dynamics
simulation
delineate
ligand-mediated
inter-cluster
interactions
such
as
ligand
metal
core
coordination,
H─bonding
π-π
playing
a
crucial
role
formation
self-assembled
structure.
Language: Английский
Near-Infrared Phosphorescent Silver Nanoclusters/Polyethylenimine Nanocomposites for Photothermal Conversion
ACS Applied Materials & Interfaces,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
Emerging
as
a
promising
functional
material,
metal
nanoclusters
that
emit
near-infrared
(NIR)
radiation
have
garnered
significant
attention
due
to
their
distinctive
properties.
Nonetheless,
the
rational
design
of
NIR-emissive
still
faces
substantial
challenges.
Herein,
we
demonstrate
self-assembly
strategy
for
constructing
nanocomposites
(abbreviated
Ag9-NCs/PEI)
using
water-soluble
Ag9-NCs
(Ag9(mba)9,
where
H2mba
=
2-mercaptobenzoic
acid)
and
branched
polyethylenimine
(PEI)
(Mw
750,000).
The
Ag9-NCs/PEI
exhibits
excellent
phosphorescent
properties,
demonstrating
broad
NIR
phosphorescence
band
spanning
from
750
1200
nm
(NIR:
>750
nm)
three-component
microsecond
lifetimes
(τ1
2.22
μs;
τ2
33.31
τ3
230.76
μs)
at
room
temperature.
This
behavior
is
attributed
incorporation
three
triplet
emitting
states,
verified
by
temperature-dependent
steady/transient
emission
spectra
time-resolved
transient
(TRES).
More
importantly,
nanocomposite
also
demonstrates
exceptional
photothermal
conversion
with
temperature
elevating
promptly
22
310
°C
within
just
10
s
upon
660
laser
irradiation
(0.8
W/cm2).
notable
phosphorescence,
especially
in
region,
rarely
observed
silver
cluster
nanocomposites.
Language: Английский
Dimensional Control and Optical Properties of Tunable Silver Coordination Polymers via Nanocluster Assembly
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 15, 2025
The
controlled
assembly
of
silver
nanoclusters
(NCs)
into
tunable
coordination
polymers
(CPs)
presents
opportunities
for
functional
material
design,
although
stability-related
challenges
persist.
Herein,
we
report
the
synthesis
three
CPs
(1-3)
by
adjusting
reaction
conditions,
such
as
method
and
solvent,
facilitating
self-assembly
NCs
with
4,8-ethenobenzo[1,2-c:4,5-c']
dipyrrole-1,3,5,7(2H,6H)-tetrone
(BDI)
ligand.
Single
crystal
X-ray
diffraction
analyses
reveal
distinct
architectures:
a
one-dimensional
cyclic
loop
chain
(1),
two-dimensional
layered
structure
(2),
2-fold
interpenetrated
(3).
We
systematically
explore
hydrogen
bonding
interactions,
structural
stability,
optical
properties
these
materials,
demonstrating
that
spatial
arrangement
BDI
ligands
dictates
both
dimensionality
photophysical
behavior.
This
study
provides
new
insights
design
silver-based
enhanced
paves
way
advanced
applications
in
optoelectronics
molecular
sensing.
Language: Английский
Two- and Three-Dimensional Silver Cluster Assemblies: Effect of Argentophilic Interactions in Photoluminescence
Priyanka Chandrashekar,
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Dayona Aleyamma Varghese,
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Teena Thomas
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et al.
The Journal of Physical Chemistry Letters,
Journal Year:
2025,
Volume and Issue:
unknown, P. 4107 - 4113
Published: April 17, 2025
Silver
nanocluster
assemblies
are
an
emerging
class
of
fluorescent
and
stable
solid
materials
by
virtue
their
structural
tunability
stability
compared
to
isolated
clusters.
The
photophysical
properties
the
cluster
nodes
influenced
intra-
or
intercluster
interaction.
In
this
work,
we
show
two-dimensional
(2D)
[Ag5(C2tBu)2(CF3COO)3(C4H4N2)](CHCl3)
three-dimensional
(3D)
[Ag4(C2tBu)(CF3COO)3(C4H4N2)]
silver
obtained
tuning
molar
ratios
same
protecting
ligands
linker.
2D
assembly
possesses
a
one-dimensional
(1D)
chain
held
together
through
Ag···Ag
interactions,
whereas
in
3D
assembly,
Ag4
units
linked
trifluoroacetate
form
1D
with
Ag4-O-Ag4
Ag4-O-C-O-Ag4
connectivity.
This
varying
effect
argentophilic
interaction
influences
photoluminescence
properties.
emission
was
found
be
dominated
cluster-centered
state
owning
enhanced
3D,
is
from
theoretical
investigations
also
revealed
that
lowest
unoccupied
molecular
orbitals
(LUMOs)
localized
on
pyrazine
contrast,
LUMOs
mostly
metal
atoms
within
cluster.
work
highlights
not
only
importance
synthesis
but
emphasizes
understanding
structure-luminescence
relationship.
Language: Английский
Real-time, specific, and label-free transistor-based sensing of organophosphates in liquid
Rakefet Samueli,
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Shubham Babbar,
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Yuval Ben‐Shahar
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et al.
Environmental Research,
Journal Year:
2024,
Volume and Issue:
263, P. 120089 - 120089
Published: Oct. 5, 2024
Language: Английский
Inflection of Resistive Switching Behavior in Atomically Precise Silver Cluster‐Assembled Materials
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 10, 2024
Bottom-up
design
of
electronic
materials
based
on
nanometer-sized
building
blocks
requires
precise
control
over
their
self-assembly
process.
Atomically
metal
nanoclusters
(NCs)
are
the
well-characterized
for
crafting
tunable
nanomaterials.
Here,
a
solution-processed
assembly
newly
synthesized
molecular
silver
nanocluster
(0
D
Ag
Language: Английский
Tailoring the Photoluminescence of AIE-Type Gold Nanoclusters via Biomineralization-Inspired Polymorphism
S. Mahata,
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Satya Ranjan Sahoo,
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Arun K. Mukhopadhyay
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et al.
Nanoscale,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 19, 2024
By
mimicking
biomineralization,
this
study
introduces
a
facile
approach
to
incorporate
Au
22
SG
18
nanoclusters
within
different
polymorphs
of
CaCO
3
and
reveal
that
variations
in
the
nanocluster
photoluminescence
are
linked
polymorph
stability.
Language: Английский
Recent Advances of Strategies and Applications in Aptamer-Combined Metal Nanocluster Biosensing Systems
K. H. Kim,
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Sang-Ho Kim,
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Seung Min Yoo
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et al.
Biosensors,
Journal Year:
2024,
Volume and Issue:
14(12), P. 625 - 625
Published: Dec. 18, 2024
Metal
nanoclusters
(NCs)
are
promising
alternatives
to
organic
dyes
and
quantum
dots.
These
NCs
exhibit
unique
physical
chemical
properties,
such
as
fluorescence,
chirality,
magnetism
catalysis,
which
contribute
significant
advancements
in
biosensing,
biomedical
diagnostics
therapy.
Through
adjustments
composition,
size,
environments
surface
ligands,
it
is
possible
create
with
tunable
optoelectronic
catalytic
activity.
This
review
focuses
on
the
integration
of
aptamers
metal
NCs,
detailing
molecular
detection
strategies
that
utilise
effect
optical
signal
emission
NC-based
biosensing
systems.
also
highlights
recent
applications,
well
illustrative
case
studies.
To
conclude,
strengths,
limitations,
current
challenges
prospects
for
systems
were
examined.
Language: Английский